The Office's David Denman is set to join the cast of Parenthood in a recurring role of Ed, we've exclusively learned. A recently unemployed stay-at-home dad, Ed meets Julia when they both end up with the least-desirable volunteer job at their children's school. Ruh-roh, watch out Joel!

But Denman's Ed isn't the only new character who could potentially come between Joel and Julia when the NBC family drama returns on Sept. 26...

Lost's Sonya Walger (Penny!) has also joined the cast for a multi-episode arc as the sexy and confident Meredith, an architect who is working with Joel on a longterm project. When she first appears in the premiere, she makes Julia feel embarrassed about being a stay-at-home parent, which we're guessing will give her something in common with Ed.

In addition to playing Pam's (Jenna Fischer) fiancée Roy (aka he who will never be as good as Jim) on The Office, Denman's credits include Drop Dead Diva, Traffic Light and Person of Interest. He recently co-starred in Will Smith's After Earth, as well as CBS' Beverly Hills Cop reboot, which was not picked up to series.

Also set to join the cast of Parenthood in season five, which will be a full 22 episodes, is Drop Dead Diva's Josh Stamberg as Carl, a potential new love interest for Sarah (Lauren Graham) who lives in the apartment building she is living in and attempting to manage.